Coal-oil burner for cook-stoves.



R. R. HOPKINS. COAL OIL BURNER FOR COOK STOVES.

APPLICATION FILED APR. 9. 1,911.

I Patented Aug. 14,1917.

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R. R. HOPKINS.

COAL OII. BURNER FOR COOK STOVES.

APPLICATION FILED APR-9.19M.

Patented Aug. 1 1, 1917.

2 SHEETS-SHEET 2.

RICHARD R. HOPKINS, OF OSKALOOSA, IOWA.

COAL-OIL BURNER FOR COOK-STOVES.

Specification of Letters Patent.

Patented Aug. 14., 1917.

Application filed April 9, 1917. Serial No. 160,817.

To all whom it may concern:

Be it known that I, RICHARD R. Horxnvs, a citizen of the United States, residing at Oskaloosa, in the county of Mahaska and State of Iowa, have invented a new and useful Coal-Oil Burner for Cook-Stoves, of which the following is a specification.

The device forming the subject matter of this application is adapted to be employed for converting liquid fuel into gas and for consuming the gas for heating purposes.

The invention aims toprovide novel means whereby air is mixed with the gas, to provide novel means for converting the liquid fuel into gas, and to provide a compact structure which may be assembled readily with a heater, without working essential changes in the structure of the heater.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 is a vertical section of a heater, wherein the device forming the subject matter of this application has been mounted, parts of the structure appearing in elevation;

Fig. 2 is a cross section on the line 22 of Fig. 1; and

Fig. 3 is a cross section on the line 33 of Fig. 1.

The structure hereinafter described is adapted to be used in connection with a ieater of any sort which, as indicated in Fig. 1, may comprise walls 1 and a grate 2.

superposed on the grate 2 is a drum 3 having a depending air inlet 4 including a lateral extension 5 which may be prolonged through one of the doors (not shown) of the heater, the extension 5 being controlled by a damper 6 of any desired sort. Vertical mixing tubes 7 are superposed upon and connected to the drum 3 and open at their the bottom of the shown) or 1 tal priming lower ends into the drum. The upper ends of the mixing tubes 7 are tapered, as shown at 8. The air inlet 4 preferably opens into drum 3 midway between the mixing tubes 7. The tapered up per ends 8 of the mixing tubes 7 are supplied ivlvith 9upwardly opening combustion orices The numeral 10 denotes a horizontal fuel supply pipe disposed above the drum 3 and extended laterally through the walls 1 of the heater, the fuel supply pipe being provided, exteriorly of the walls of the heater, with a cut-off valve 11 of any desired construction. The fuel supply pipe 10 is adapted to be connected at its outer end with a tank (not other means whereby oil may be supplied tothe pipe 10. The pipe 10 includes a vertical extension 12 preferably disposed above the geometrical center of the drum 3. The part 12 passes through a thimble 14 constituting a part of a horizonpan 15. The mixing tubes 7 pass through the bottom of the priming pan 15.

Disposed above the mixing tubes 7 is a dome-like retort 16 including a bottom 17 and a top 18, the parts 17 and 18 being threaded together or otherwise connected,

as shown at 19. The bottom 17 of the retort 16 is supplied with a boss 20 through which the pipe 12 passes. The top 18 of the retort is provided with a boss 21 receiving a short pipe 22, the pipes 22 and 12 serving to support the retort 16. The pipe 22 communicates with T 23 interposed in a horizontal pipe 24 having depending branches 25 connected at their lower ends with Ts 26. Assembled with the Ts 26 and constituting extensions of the pipes 25 are discharge pipes 27 which are closed at their inner ends, as shown at 28, the discharge pipes 27 being horizontally disposed, and passing through the rim of the priming pan l5 and through the mixing tubes 7. The discharge pipes 27 are supplied with orifices 29 disposed within the contour of the mixing tubes 7. Mounted in the outer ends of the Ts 26 are plugs 30 into which are threaded needle valves 31, passing outwardly through the walls 1 of the heater, and supplied externally of the said Walls with any suitable means indicated at 32 whereby the valves may be rotated. The innerends of the T ()FICE.

needle valves 31 cooperate with seats 33, mounted in the discharge pipes 27.

In practical operation, the liquid fuel supplied through the pipe 10 traverses the pipe 12 and is discharged into the retort 16. In the retort 16, the fuel is heated and converted into gas, the gas entering the pipe 24k by Way of the pipe 22, and passing laterally in opposite directions into the depending branches 25, the gas passing thence into the discharge pipes 27, and moving out of the discharge pipes 27, Within the contour of the mixing tubes 7 through the orifices 29. Air is admitted to the drum 3 by Way of the inlet a and its extension 5, the amount of air supply being regulated by manipulating the damper 6. The air in the drum 3 passes upwardly into the tubes 7, and, mingling with the gas proceeding through the orifices 9, forms a mixture which burns at the combustion orifices 9 in the upper ends 8 of the mixing tubes 7. The heat produced at the combustion orifices 9 raises the temperature of the retort 16 and its contents, so that the liquid fuel in the retort is converted into gas as aforesaid. A priming charge may be placed in the pan 15 and ignited, for the purpose of heating the retort 16 initially, before the retort has produced enough gas to burn in a satisfactory manner at the orifices 29 in the pipes 27. The priming pan 16 is suspended and upheld by the pipes 27, and since the pipe 12-passes through the thimble lt of the priming pan, the priming pan will not tilt on the pipes 27.

Gopies of this patent may be obtained for Having thus described the invention, what is claimed is In a device of the class described, an air drum having an inlet; means for controlling the admission of air to the inlet; mixing tubes upstanding from the drum and communicating therewith, the tubes having combustion orifices in their upper ends; a priming pan above the drum and spaced vertically therefrom, the pan comprising an upstanding peripheral flange, which the tubes extend; a loop-shaped pipe comprising inwardly extended lower end portions entering the tubes, thereby to sup port the pipe on the tubes, the end portions of the pipe having outlets located within the tubes and cooperating with the combustion orifices, the end portions of the pipe passing through the flange, thereby to support the an; a retort above the pan and the tubes and spaced vertically therefrom; a. conduit leading from the top of the retort to the intermediate portion of the loop-shaped pipe; a fuel supply pipe passing through the bottom of the pan and entering the bottom of the retort; and valves in the loop shaped pipe and controlling the flow of fuel to the lower end portions of the pipe.

In testimony that I claim the foregoing as my own, I have in the presence of two witnesses.

RICHARD H. HOPKINS.

Witnesses:

W. G. Jonns, J. MILLER BEARD.

five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

hereto affixed my signature I and a bottom through 

